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Session: Session 2A: Turbines-Design aspects (2)
Session starts: Monday 09 September, 14:00
Presentation starts: 14:40
Room: Olympia

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Ningjian Peng (PHD)
Enhua Wang (Correspending professor)

Abstract:
Carbon dioxide power cycle has many advantages for future energy utilization. Turbine is a vital component in this system, and its efficiency has a great impact on system performance. In general, the efficiency of turbine expander is assumed to be a fixed value according to experience when analysing the performance of carbon dioxide power cycle. However, the thermodynamic properties of working fluid have a great influence on turbine efficiency, so design parameters are critical to ensure a high efficiency of carbon dioxide turbine. On the other hand, most of the carbon dioxide turbines for MW-class are radial turbines at present whereas axial turbines take advantages in terms of fluidity and simple structure compared with radial turbines. In this study, one dimensional design is carried out for a single-stage carbon dioxide axial-flow turbine by a mean-line design procedure, and geometric parameters of the flow passage and turbine efficiency are obtained. The results can provide a reference for the practical design of turbine expander of carbon dioxide power cycle system.